DCF assumptions — load-bearing inputs
Scope. This file enumerates the inputs that drive a GFS DCF — it does not run a complete valuation model. The triangulated valuation case lives in
../07_thesis/. Use this file as a reference for any per-share fair-value scenario.Confidence legend: ✓ verified-primary (20-F / 6-K) · ◐ aggregator / market data · ⚠ inferred / estimate / scenario
1. Capital structure / WACC anchor
| Component | Value | Notes / Source |
|---|---|---|
| Risk-free rate (10Y UST) | 4.30% ◐ | April 2026 yield curve; Fed-rate-cycle-adjusted |
| Equity risk premium | 5.5% ⚠ | Mid-cycle US ERP per Damodaran-style framework |
| Beta (5-yr levered) | 1.50 ✓ | Per STOCK_PRICE_DATA.json |
| Cost of equity = Rf + β × ERP | 12.55% | Computed |
| Pre-tax cost of debt | 5.50% ⚠ | Implied from FY25 interest expense $93M / avg debt ~$1.5B; partially offset by EDB low-rate Singapore loan |
| After-tax cost of debt (T = 21%) | 4.35% | Computed |
| Debt / (Debt + Equity) at market values | ~3.5% | Mkt cap $33.1B / Total cap $34.3B |
| Equity / (Debt + Equity) | ~96.5% | |
| WACC | 12.30% ⚠ | Lightly debt-funded; near cost-of-equity |
Read on WACC. GFS is structurally near cost-of-equity because of its modest debt load ($1.2B vs $33B mkt cap). Standard analyst convention would use WACC of 11-13% for GFS — at the higher end of semis-comps because of cyclicality, foreign-incorporation tax friction, and Mubadala-controlled discount. Comparison: TSMC WACC is typically 9-10%; UMC 10-11%.
2. Terminal growth assumptions
| Scenario | Terminal growth (g) | Implied terminal year | Comment |
|---|---|---|---|
| Bear | 2.0% | 2031+ | Mature-foundry secular growth = global semis CAGR |
| Base | 3.0% | 2031+ | Specialty-foundry mix lifts above commodity-foundry average |
| Bull | 4.0% | 2031+ | AI / Comm-DC mix shift sustains above-average growth |
Implied EV/EBITDA exit multiples (using 12.3% WACC):
- Bear (g=2%): 1 / (12.3% − 2%) = ~9.7x EV/Forward-period-EBITDA
- Base (g=3%): 1 / (12.3% − 3%) = ~10.7x
- Bull (g=4%): 1 / (12.3% − 4%) = ~12.1x
These exit multiples are internally consistent with the comp-set trading multiples (UMC ~5.5x, SMIC ~13x, VIS ~8x, Tower ~9.5x, TSMC ~14.5x).
3. Revenue forecast — segment-level scaffolding
Build-up of FY26-FY30 revenue from the FY25 base of $6,791M:
Bear case ⚠
| Segment | FY25 ($M) | FY26E | FY27E | FY28E | FY29E | FY30E | 5Y CAGR |
|---|---|---|---|---|---|---|---|
| Smart Mobile | 2,678 | 2,500 | 2,400 | 2,400 | 2,450 | 2,500 | −1.4% |
| Automotive | 1,410 | 1,540 | 1,650 | 1,750 | 1,840 | 1,920 | +6.4% |
| Home/IIoT | 1,189 | 1,200 | 1,250 | 1,300 | 1,350 | 1,400 | +3.3% |
| Comm/Infra/DC | 745 | 800 | 880 | 970 | 1,070 | 1,180 | +9.6% |
| Non-Wafer | 769 | 800 | 850 | 900 | 950 | 1,000 | +5.4% |
| Total | 6,791 | 6,840 | 7,030 | 7,320 | 7,660 | 8,000 | +3.3% |
Base case (mgmt-aligned trajectory) ⚠
| Segment | FY25 ($M) | FY26E | FY27E | FY28E | FY29E | FY30E | 5Y CAGR |
|---|---|---|---|---|---|---|---|
| Smart Mobile | 2,678 | 2,650 | 2,700 | 2,800 | 2,900 | 3,000 | +2.3% |
| Automotive | 1,410 | 1,620 | 1,830 | 2,050 | 2,260 | 2,470 | +11.9% |
| Home/IIoT | 1,189 | 1,250 | 1,330 | 1,420 | 1,510 | 1,600 | +6.1% |
| Comm/Infra/DC | 745 | 930 | 1,150 | 1,400 | 1,680 | 2,000 | +21.9% |
| Non-Wafer | 769 | 870 | 970 | 1,070 | 1,180 | 1,300 | +11.1% |
| Total | 6,791 | 7,320 | 7,980 | 8,740 | 9,530 | 10,370 | +8.8% |
Bull case ⚠
| Segment | FY25 ($M) | FY26E | FY27E | FY28E | FY29E | FY30E | 5Y CAGR |
|---|---|---|---|---|---|---|---|
| Smart Mobile | 2,678 | 2,750 | 2,900 | 3,050 | 3,200 | 3,400 | +4.9% |
| Automotive | 1,410 | 1,700 | 1,980 | 2,260 | 2,540 | 2,820 | +14.9% |
| Home/IIoT | 1,189 | 1,300 | 1,420 | 1,540 | 1,670 | 1,800 | +8.6% |
| Comm/Infra/DC | 745 | 1,050 | 1,400 | 1,800 | 2,250 | 2,800 | +30.3% |
| Non-Wafer | 769 | 920 | 1,070 | 1,250 | 1,440 | 1,650 | +16.5% |
| Total | 6,791 | 7,720 | 8,770 | 9,900 | 11,100 | 12,470 | +12.9% |
The load-bearing segment is Comm/Infra/DC. In bull case, this segment goes from $745M (FY25) → $2,800M (FY30) at +30% CAGR — driven by hyperscaler co-packaged optics demand, Marvell custom-AI silicon ramps, NLM Photonics + Ayar Labs production scale, and Lightwave Logic electro-optic polymer monetization through 2027-2030. This segment carries materially higher gross margin than the consolidated average.
4. Margin trajectory — the Q4’25 inflection
Per margins and pricing, Q4’25 IFRS GM was 27.8% and non-IFRS GM 29.0%.
| Year | IFRS GM (analyst) | Non-IFRS GM (analyst) | Adj. EBITDA margin |
|---|---|---|---|
| FY24 actual | 24.5% | 25.3% | n/d |
| FY25 actual | 24.9% | 26.1% | 34.7% (FY25 full) |
| FY26E base ⚠ | 26.5% | 27.5% | 35.5% |
| FY27E base ⚠ | 27.5% | 28.5% | 36.5% |
| FY28E base ⚠ | 28.5% | 29.5% | 37.5% |
| FY29E base ⚠ | 29.0% | 30.0% | 38.0% |
| FY30E base ⚠ | 29.5% | 30.5% | 38.5% |
Drivers:
- Mix shift to Auto + Comm/DC + Non-Wafer (mgmt-driven)
- Sustained cost discipline + opex leverage
- AMITC depreciation-shield offset starting FY26
- Photonics-process ASP premium realization
5. Capital intensity (Capex / Sales)
| Year | Capex ($M) | Revenue ($M) | Capex / Sales |
|---|---|---|---|
| FY23 | 1,804 ✓ | 7,392 | 24.4% |
| FY24 | 625 ✓ | 6,750 | 9.3% (cycle trough) |
| FY25 | 722 ✓ | 6,791 | 10.6% |
| FY26E base ⚠ | 1,000 | 7,320 | 13.7% |
| FY27E base ⚠ | 1,250 | 7,980 | 15.7% |
| FY28E base ⚠ | 1,400 | 8,740 | 16.0% |
| FY29E base ⚠ | 1,300 | 9,530 | 13.6% |
| FY30E base ⚠ | 1,300 | 10,370 | 12.5% |
Mid-cycle capex/sales of ~13-16% is consistent with management commentary on capacity buildout for AI / advanced packaging.
Government grant offsets to capex (deferred-income recognition):
- CHIPS Direct Funding $1.575B over 4-5 years = ~$315-395M annual disbursement (milestone-dependent)
- NY State $570M over 3-4 years = ~$140-190M annual
- AMITC tax credit at 35% on AMITC-eligible capex (likely ~70% of total capex) = effective tax credit ~$200-300M annual on $1.0-1.4B capex
- Total annual subsidy / credit: $650-900M vs gross capex $1.0-1.4B → net capex of $200-500M annually (very capital-light effective)
The CHIPS / AMITC government-subsidy stack is the single most important “cash” input to a GFS DCF. It transforms the DCF from a “capital-intensive specialty foundry” model to something approaching “asset-light specialty supplier” — with effective net capex of just 4-7% of sales after subsidies.
6. Tax rate
GFS is Cayman-incorporated (Cayman → no corporate tax) but generates income across US, Germany, Singapore, and other jurisdictions. Effective tax rate FY25: 2.5% ($23M tax / $911M pre-tax income) — extremely low due to:
- AMITC tax credit refund timing
- Singapore tax incentives (EDB-supported)
- Cayman Islands tax neutrality at parent level
- US tax loss carryforwards from FY24
Forward tax rate assumptions:
- FY26E: ~5-8% ⚠ (AMITC enhanced; some normalization)
- FY27E: ~8-12% ⚠ (CHIPS / AMITC steady-state)
- FY28E+: ~12-18% ⚠ (more normal effective rate)
OBBBA (signed July 2025) provides additional tax shielding via:
- 100% accelerated depreciation for qualifying property placed in service 2025+
- Immediate R&D expense deduction (vs prior 5-year amortization)
- §163(j) interest deduction modifications
Read. GFS’s effective tax rate is structurally low (2-12% range) for the forecast period, providing meaningful EPS uplift. Watch for OBBBA-related disclosures in 2026 6-Ks.
7. Working capital and cash conversion
- Days sales outstanding (DSO): est. ~50-60 days based on FY25 receivables
- Days inventory outstanding (DIO): est. ~80-100 days (foundry typical)
- Days payable outstanding (DPO): est. ~70-85 days
- Cash conversion cycle: est. ~60-75 days
- Working capital / sales: ~15-18% sustained
These metrics are typical for a 200/300mm specialty foundry; they suggest working capital should grow approximately in proportion to revenue with no major deleveraging or buildup events expected.
8. Per-share fair-value range — illustrative scenarios
Illustrative only — full triangulation lives in valuation framework (file not yet written).
| Scenario | FY28E revenue | FY28E adj. EBITDA | Exit EV/EBITDA | Implied FY28 EV ($B) | Implied mkt cap ($B) | Per share ($) | vs. $59.49 spot |
|---|---|---|---|---|---|---|---|
| Bear | 7.32 | 2.6 | 9x | 23.4 | 26.2 | $46 | −23% |
| Base | 8.74 | 3.3 | 11x | 36.3 | 39.1 | $70 | +18% |
| Bull | 9.90 | 3.9 | 13x | 50.7 | 53.5 | $96 | +61% |
Probability-weighted (20% Bear / 50% Base / 30% Bull): 0.20 × $46 + 0.50 × $70 + 0.30 × $96 = $72.90/share ⚠ — implying ~22% upside vs $59.49 spot.
Read. Probability-weighted valuation is moderately above spot, anchored on the AI/photonics-driven Comm/Infra/DC segment doubling+ over 5 years. The bear case (−23%) is real and reflects (a) Smart Mobile compression accelerates, (b) photonics ramp slower-than-modeled, (c) ICFR remediation adversarial. The bull case (+61%) requires Comm/Infra/DC to reach $1.8B+ FY28 — which assumes Marvell + Ayar Labs + LWLG-enabled customers all hit full-volume production at GFS by 2028.
9. Open items / backfill queue
- Sell-side DCF reconstruction — extract analyst notes (TD Cowen, Citi, JPM, Goldman, BofA, MS, SIG) and reconcile WACC + terminal growth assumptions across the desk.
- Beta calculation primary-source —
STOCK_PRICE_DATA.jsonreports beta 1.50; reconcile vs Bloomberg / Yahoo / Refinitiv betas. - Per-segment gross margin assumptions — currently inferred at corporate level; sub-segment GM extraction from Industry Analyst Day or sell-side disaggregations.
- Capex by fab / by program — not disclosed publicly; private channel checks would refine.
- OBBBA quantification — the FY25 20-F notes the policy change but does not disclose dollar quantum of expected benefit. Would refine forward tax-rate forecast.
Sources
- FY2025 20-F, acc. 0001709048-26-000022, filed 2026-02-27 — historical financials, Note 3 income tax disclosures, OBBBA reference.
- Q4’25 6-K, acc. 0001709048-26-000012, filed 2026-02-11 — FY25 full-year actuals, Q1 2026 guidance.
STOCK_PRICE_DATA.json— spot, beta.- CBOE-derived options data (
STOCK_OPTIONS_DATA.json, refreshed 2026-04-29) — option-implied vol input to DCF cross-check.
Cross-references
- quarterly trend — historical P&L base
- margins and pricing — GM trajectory drivers
- capex cycle — capex history + CHIPS/AMITC framework
- balance sheet — net cash + debt position for EV bridge
- comps valuation — peer-set multiple anchor
- overview — full thesis triangulation